Not only improves efficiency but also protects against dirt, dust, sand and other elements. Off-road tough materials like high quality Oxford nylon fabric on the sides and top. Hard-wearing rubber coated nylon is used for the bottom and ends. Insulated with an aluminum coated polyester lining. Top flap made with split to give you optional reversible lid opening. Vent access to avoid overheating and keep performance smooth. Durable zippers and hardware. Plastic window so you can always check the LED display and controls. Keep your fridge looking and operating like new. Convenient cut-outs for easy access to the carrying handles. Pockets on the exterior next to the USB output can be used for phones or other gear.